Инд. авторы:	Borodina U.O, Likhacheva A.Y., Golovin A.V., Goryainov S.V., Rashchenko S.V., Korsakov A.V.
Заглавие:	Raman spectra of shortite Na2Ca2(CO3)(3) compressed up to 8GPa
Библ. ссылка:	Borodina U.O, Likhacheva A.Y., Golovin A.V., Goryainov S.V., Rashchenko S.V., Korsakov A.V. Raman spectra of shortite Na2Ca2(CO3)(3) compressed up to 8GPa // High Pressure Research. - 2018. - Vol.38. - Iss. 3. - P.293-302. - ISSN 0895-7959. - EISSN 1477-2299.
Внешние системы:	DOI: 10.1080/08957959.2018.1488973; РИНЦ: 35756521; SCOPUS: 2-s2.0-85049610966; WoS: 000438637800009;
Реферат:	eng: A rare mineral shortite, Na2Ca2(CO3)(3), occurs among groundmass minerals in unaltered kimberlites, which suggests its participation in the evolution of kimberlite system. This work presents a high pressure Raman spectroscopic study of natural shortite (Udachnaya east kimberlites) compressed in KBr up to 8GPa in a diamond anvil cell. At ambient pressure the spectrum contains two strong bands related to symmetric C-O stretching vibrations, four in-plane bending modes, and several low-frequency modes of lattice vibrations. Upon the pressure increase up to 8GPa, almost all the bands exhibit positive shift with the rate of 1-4cm(-1)/GPa for the lattice modes and 3.6 and 3.9cm(-1)/GPa for the C-O stretching modes. The shifts of Raman modes are rather regular, which implies the absence of reconstructive phase transitions within the studied pressure range, similarly to the behavior of nyerereite, a related carbonate mineral. However, minor anomalies in the /P and FWHM/P dependences, observed at about 2GPa, suggest some rearrangement and disordering of carbonate groups. The obtained data can be used for the estimation of residual pressure in shortite-bearing inclusions in deep-seated minerals.
Ключевые слова:	EVOLUTION; CALCITE; MINERALS; NYEREREITE; MANTLE; CARBONATE; HIGH-PRESSURE; MICRO-INCLUSIONS; diamond anvil cell; Raman spectroscopy; carbonate; Shortite; KIMBERLITE; ARAGONITE;
Издано:	2018
Физ. характеристика:	с.293-302
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